[IDEM libro trigesimo sexto ad Quintum Mucium. ] §44.7.57.prIn omnibus negotiis contrahendis, siue bona fide sint siue non sint, si error aliquis interuenit, ut aliud sentiat puta qui emit aut qui conducit, aliud qui cum his contrahit, nihil ualet quod acti sit.
[THE SAME, On Quintus Mucius, Book XXXVI] In all transactions to be contracted, whether they are in good faith or not, if any error intervenes, so that, for example, the buyer or the hirer thinks one thing, and the person contracting with them thinks another, what has been done has no validity.
et idem in societate quoque coeunda respondendum est, ut, si dissentiant aliud alio existimante, nihil ualet ea societas, quae in consensu consistit.
And the same opinion must be given also in entering into a partnership, so that, if they disagree, each thinking a different thing, that partnership, which consists in consent, has no validity.